I am learning the honorific and humble forms, and am confused by the precises situations in which you use them. I understand that when speaking directly to an individual of higher status, one would use the honorific forms when discussing your conversation partner, and one cold also use the humble forms when discussing oneself. However, what form to use when talking about a superior with an equal? For example asking your classmate Yuki whether your professor has been to England, which would be more appropriate?
ユキさん、先生は英国へ行きのがありましたか?
ユキさん、先生は英国へいらっしゃいのがありましたか?
Thanks!